package com.zhao.myreader.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Created by zhao on 2016/11/24.
 */

public class Lunar
{
    private int year;
    private int month;
    private int day;
    private boolean leap;
    final static String chineseNumber[] =
            { "一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" };
    final static String Big_Or_Small[] =
            { "大", "小", "大", "小", "大", "小", "大", "大", "小", "大", "小", "大" };
    private String[] LunarHolDayName =
            { "小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至",
                    "小暑", "大暑", "立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪",
                    "冬至" };

    static SimpleDateFormat chineseDateFormat = new SimpleDateFormat(" yyyy年MM月dd日 ");
    final static long[] lunarInfo = new long[]
            { 0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0,
                    0x09ad0, 0x055d2, 0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255,
                    0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0,
                    0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2,
                    0x04970, 0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60,
                    0x186e3, 0x092e0, 0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550,
                    0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557,
                    0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0,
                    0x0a9a8, 0x0e950, 0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4,
                    0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0,
                    0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540,
                    0x0b5a0, 0x195a6, 0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a,
                    0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970,
                    0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5,
                    0x092e0, 0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0,
                    0x0abb7, 0x025d0, 0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4,
                    0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930,
                    0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0,
                    0x0d260, 0x0ea65, 0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7,
                    0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0,
                    0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255,
                    0x06d20, 0x0ada0 };

    // ====== 传回农历 y年的总天数
    final private static int yearDays(int y)
    {
        int i, sum = 348;
        for (i = 0x8000; i > 0x8; i >>= 1)
        {
            if ((lunarInfo[y - 1900] & i) != 0)
                sum += 1;
        }
        return (sum + leapDays(y));
    }

    // ====== 传回农历 y年闰月的天数
    final private static int leapDays(int y)
    {
        if (leapMonth(y) != 0)
        {
            if ((lunarInfo[y - 1900] & 0x10000) != 0)
                return 30;
            else
                return 29;
        }
        else
            return 0;
    }

    // ====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
    final private static int leapMonth(int y)
    {
        return (int) (lunarInfo[y - 1900] & 0xf);
    }

    // ====== 传回农历 y年m月的总天数
    final private static int monthDays(int y, int m)
    {
        if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
            return 29;
        else
            return 30;
    }

    // ====== 传回农历 y年的生肖
    final public String animalsYear()
    {
        final String[] Animals = new String[]
                { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };
        return Animals[(year - 4) % 12];
    }

    // ====== 传入 月日的offset 传回干支, 0=甲子
    final private static String cyclicalm(int num)
    {
        final String[] Gan = new String[]
                { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
        final String[] Zhi = new String[]
                { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
        return (Gan[num % 10] + Zhi[num % 12]);
    }

    // ====== 传入 offset 传回干支, 0=甲子
    final public String cyclical()
    {
        int num = year - 1900 + 36;
        return (cyclicalm(num));
    }

    /** */
    /**
     * 传出y年m月d日对应的农历. yearCyl3:农历年与1864的相差数 ? monCyl4:从1900年1月31日以来,闰月数
     * dayCyl5:与1900年1月31日相差的天数,再加40 ?
     *
     * @param cal
     * @return
     */
    public Lunar(Calendar cal)
    {
        // cal.add(cal.get(Calendar.DAY_OF_MONTH),1);
        @SuppressWarnings(" unused ")
        int yearCyl, monCyl, dayCyl;
        int leapMonth = 0;
        Date baseDate = null;
        try
        {
            baseDate = chineseDateFormat.parse(" 1900年1月31日 ");
        }
        catch (ParseException e)
        {
            e.printStackTrace(); // To change body of catch statement use
            // Options | File Templates.
        }

        // 求出和1900年1月31日相差的天数
        int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
        dayCyl = offset + 40;
        monCyl = 14;

        // 用offset减去每农历年的天数
        // 计算当天是农历第几天
        // i最终结果是农历的年份
        // offset是当年的第几天
        int iYear, daysOfYear = 0;
        for (iYear = 1900; iYear < 2050 && offset > 0; iYear++)
        {
            daysOfYear = yearDays(iYear);
            offset -= daysOfYear;
            monCyl += 12;
        }
        if (offset < 0)
        {
            offset += daysOfYear;
            iYear--;
            monCyl -= 12;
        }
        // 农历年份
        year = iYear;

        yearCyl = iYear - 1864;
        leapMonth = leapMonth(iYear); // 闰哪个月,1-12
        leap = false;

        // 用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天
        int iMonth, daysOfMonth = 0;
        for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++)
        {
            // 闰月
            if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap)
            {
                --iMonth;
                leap = true;
                daysOfMonth = leapDays(year);
            }
            else
                daysOfMonth = monthDays(year, iMonth);

            offset -= daysOfMonth;
            // 解除闰月
            if (leap && iMonth == (leapMonth + 1))
                leap = false;
            if (!leap)
                monCyl++;
        }
        // offset为0时，并且刚才计算的月份是闰月，要校正
        if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1)
        {
            if (leap)
            {
                leap = false;
            }
            else
            {
                leap = true;
                --iMonth;
                --monCyl;
            }
        }
        // offset小于0时，也要校正
        if (offset < 0)
        {
            offset += daysOfMonth;
            --iMonth;
            --monCyl;
        }
        month = iMonth;
        day = offset + 1;
    }

    public static String getChinaDayString(int day)
    {
        String chineseTen[] =
                { "初", "十", "廿", "卅" };
        int n = day % 10 == 0 ? 9 : day % 10 - 1;
        if (day > 30)
            return "";
        if (day == 10)
            return "初十";
        else
            return chineseTen[day / 10] + chineseNumber[n];
    }

    public String toString()
    {
        return /* cyclical() + "年" + */(leap ? "闰" : "")
                + chineseNumber[month - 1] + "月" + getChinaDayString(day);
    }

    public String numeric_md()
    {// 返回阿拉伯数字的阴历日期
        String temp_day;
        String temp_mon;
        temp_mon = month < 10 ? "0" + month : "" + month;
        temp_day = day < 10 ? "0" + day : "" + day;

        return temp_mon + temp_day;
    }

    public String get_month()
    {// 返回阴历的月份
        return chineseNumber[month - 1];
    }

    public String get_date(int year, int month, int date)
    {
       /* // 返回阴历的天
        LunarCalendar lunarCalendar = LunarCalendar.getInstance();
        String str = lunarCalendar.CalculateLunarCalendar(year,month,date);
        if(StringHelper.isEmpty(str)){
            str = getChinaDayString(day);
        }*/
        return getChinaDayString(day);
    }

    public String get_Big_Or_Small()
    {// 返回的月份的大或小
        return Big_Or_Small[month - 1];
    }

}